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Zenith 7-S-240 Eye tube question
Eliot Ness
Phorum Expert
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Posts: 3,135
Threads: 54
Joined: Apr 2011
City: Lexington, KY
#2

05-30-2016, 07:12 PM
I think the 6U5/6G5's have about the same sensitivity as the 6T5, requiring ~ -22 volts to close.  I'd check all the resistors in the AVC chain to make sure they haven't drifted.  You might also want to measure the voltage going to the eye tube to see what it is reading.

http://www.magiceyetubes.com/substitutions.htm
John KK4ZLF
Lexington, KY
"illegitimis non carborundum"
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Messages In This Thread
Zenith 7-S-240 Eye tube question - by Eric - 05-30-2016, 04:37 PM
RE: Zenith 7-S-240 Eye tube question - by Eliot Ness - 05-30-2016, 07:12 PM
RE: Zenith 7-S-240 Eye tube question - by morzh - 05-30-2016, 09:34 PM
RE: Zenith 7-S-240 Eye tube question - by Eric - 05-31-2016, 02:00 PM
RE: Zenith 7-S-240 Eye tube question - by Eric - 06-01-2016, 02:41 PM
RE: Zenith 7-S-240 Eye tube question - by Eric - 06-02-2016, 09:04 AM
RE: Zenith 7-S-240 Eye tube question - by Eric - 06-02-2016, 05:20 PM
RE: Zenith 7-S-240 Eye tube question - by Eric - 06-03-2016, 07:02 PM
RE: Zenith 7-S-240 Eye tube question - by Eric - 06-04-2016, 02:21 PM
RE: Zenith 7-S-240 Eye tube question - by Eric - 06-05-2016, 12:13 PM
RE: Zenith 7-S-240 Eye tube question - by Eric - 06-05-2016, 04:14 PM
RE: Zenith 7-S-240 Eye tube question - by Eric - 06-06-2016, 04:55 PM
RE: Zenith 7-S-240 Eye tube question - by Eric - 06-07-2016, 05:28 PM
RE: Zenith 7-S-240 Eye tube question - by Eric - 06-07-2016, 05:29 PM
RE: Zenith 7-S-240 Eye tube question - by Eric - 06-07-2016, 08:10 PM
RE: Zenith 7-S-240 Eye tube question - by Eric - 06-08-2016, 05:02 PM



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  1. The PHILCO Phorum
  2. Various and Sundry Categories
  3. Other Radios (Non-Philco)